Parent taxon: Gymnocodiaceae according to R. M. Badve and P. Kundal 1986
See also Andrews 1970 and Kiessling 2003
Sister taxa: Asterocalculus, Diversocallis, Gymnocodium, Nanjinophycus, Succodium
Subtaxa: Permocalculus ampullaceus Permocalculus armenianus Permocalculus dragastani Permocalculus fragilis Permocalculus minutus Permocalculus multiformis
Type: Gymnocodium fragile
Ecology: stationary epifaunal "photoautotroph"
Distribution:
• Paleocene to Eocene of India (1 collection)
• Cretaceous of Egypt (7), France (5), Germany (2), Iran (3), Iraq (14), Oman (1), Portugal (6), Romania (5), United States (1: Arizona)
• Jurassic of Indonesia (1), Lebanon (1), Mexico (1), Morocco (1), Portugal (2), Spain (1)
• Triassic of the Russian Federation (1)
• Permian of Armenia (3), Azerbaijan (4), Bosnia and Herzegovina (1), China (48), Croatia (3), Greece (3), Indonesia (1), Iran (1), Italy (2), Malaysia (1), Oman (2), Pakistan (1), Saudi Arabia (1), Serbia and Montenegro (2), Tajikistan (1), Thailand (1), Tunisia (4), United States (3: Nevada, Texas)
Total: 135 collections including 169 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.